Gage-cock.



INVENTOH 6-1,. 76Zlabon ATTORNEYS Patented Jan; 9, 1912 NOGRAIII l)\ASUINGTUNK IL C.

G. L. TILLOTSON &-M- H. NICHOLAS.

1 GAGE 000K.

APPLICATION FILED MAY 18, 1911.

WITNESSES COLUMBIA ILA UNITED STATES PATENT OFFICE.

GEORGE LEMUEL TILLO'ISON AND MARKS HAROLD NICHOLAS, OF PORTLAND, OREGON.

GAGE-COCK.

To all whom it may concern of Oregon, have invented a new and ImprovedGrage-Cock, of which the following is a full, clear, and exactdescription.

This invention relates to gage cocks for use with the gage glasses ofsteam boilers and for other like purposes, and has reference moreparticularly to a device of this class which comprises a valve bodyadapted to be mounted upon a boiler wall, and having avalve seat at theinside of the boiler wall, a valve stem having a valve member arrangedto cooperate with said seat, and a sleeve associated with said body andhaving threaded engagement with said valve stem.

The object of the invention is to provide a simple, strong and durablecock which can be used with the gage glasses of steam boilers, and forother like purposes, which is so constructed that if the controllingthreads of the valve stem are stripped or otherwise injured, thepressure of steam in the boiler or other pressure against the valvemember will tend to hold the latter seated, 2'. 6., closed, which, whenopened tends to break away any scale orsediment forming about the valveseat and-the'valve member, which can be easily opened and renderedaccessible for purposes of repair and replacement, which will normallydrain, and will be scoured and cleaned by the steam or water passingthrough it, and which can be openedwhile the boiler is under steampressure, as the valve member will be maintained in a seated or closedposition, upon the valve seat, by the pressure in the boiler.

The invention consists inthe construction and combination of parts to bemore fully described hereinafter and particularly set forth in theclaims. 7

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views, and in which Figure 1 is alongitudinal section of an embodiment of our invention showing theSpecification of Letters Patent.

Application filed May 18, 1911.

Serial No. 627,946.

same applied to a steam boiler, and serving Patented Jan. 9,1912.

as a drain cock; Fig. 2 is a vertical section of the cock; and Fig. 3 isa partial, vertical section of two cocks of' modified form used incombination with a gage glass, certain of the parts being broken away.

Before proceeding to a more detailed explanation of our invention, itshould be clearly understood that while the device-is particularlyuseful as a gage cock, that is, in combination with a gage glass, foruse with steam boilers, or for similar purposes,

it can also be advantageously employed for other uses, for example, as adrain cock for steam boilers or for other containers of fluids underpressure.

Certain of the details of construction' shown for example herewith, formno part of the invention, and can be varied in accordance withindividual preference and special conditions, without deviating from theessence of'the invention, as defined in the appended claims.

Referring more particularly to the drawings, we employ a gage cook orvalve body 10, fashioned from cast metal or any other suitable material,of the usual hollow form. It has at one end a reduced, threaded neck 11,by means of which it can be secured in a correspondingly threadedopening 12 of a boiler wall 13. Adjacent to the reduced neck 11, thevalve body has a part 14 of hexagonal or other angular form adapted forthe application of a wrench or other suitable implement to permit thebody to be screwed into place or removed. In the form of the deviceshown in Fig. 1, the body is extended to form an outlet or escape nozzle15. This form of the device is empl oyed when it is intended for use asa drain cockv or for like purposes. At the end of the body'remote fromthe reduced neck 11, is a second reduced and threaded neck 16, uponwhich can be screwed a correspondingly threaded retaining nut or ring 17having an internal, annular groove 18 for a purpose which will'appearhereinafter.

At the inner rim of the reduced neck 11 is formed a valve seat 19 of anysuitable form. A valve stem 20 extends through the valve body and has atthe inner end a valve member 21 formed to rest against the seat 19. Thevalve member 21 has a slot or kerf 22, so that it 'can'be suitablymanipulated in re-grinding the valve seat if such operation becomesnecessary. Intermediate its ends, the valve stem has a part 23 providedwith suitable threads, for example, with square threads, which isreceived in a corresponding, internally threaded sleeve 24. The endportions of the valve stem are of reduced diameter. Adjacent to thethreaded part, the valve stem has a part 25 of diameter equal to theexternal diameter of the threads, which is received in a bearing 26located within the valve body, and connected therewith by means ofintegral arms or connections 27, so that the. valve stem is centrallypositioned with regard to the valve body, and is movably held in place.

The sleeve 24 has a radially extended flange 28 which extends into theannular groove 18 and is clamped against the rim of the body extension16, by means of the retaining nut 17. The outer end 29 of the sleeve isthreaded to receive a corresponding, internally threaded gland nut ,30,which has a central opening 31 through which the valve stem extends. Theend face 32 of the sleeveis inwardly beveled, so that if desired,suitable packing material (not shown), can be locatedbetween the end ofthe sleeve and the gland nut. At the outer end, the valve stem carriesthe usual hand wheel 33, held in place by a retaining nut 34.. The handwheel permits the manipulation of the valve in the customary manner.

In the modified application of the invention, shown in Fig. 3, We employtwo valve members, the bodies 10 of which are similar to that of thepreviously described element. They likewise have reduced necks 11 forattachment to a boiler shell 12*, and each is provided with a retainingnut 17*, a

' sleeve 241 and a gland nut 30 The valve stem 20 has at one end a handwheel 33 and at the other end a valve member 21 corresponding to themember 21. The escape outlets or nozzles 35 are however, externallythreaded, and provided with annular grooves 36 in the rims, to receive aglass tube 37, held in place by suitable packing nuts 38. The device asdescribed, constitutes a gage glass used for determining the water levelin steam boilers, or for other like purposes.

We prefer to employ a so-called left hand thread upon the valve stem, sothat each cock or feed valve can be manipulated to open or close it inthe usual manner. By providing the valve member 21 at the inner end ofthe stem, the valve will tend normally to seat or close under theinfluence of the pressure in the boiler or other container.Consequently, if the threads should be accidentally stripped orotherwise injured upon the valve stem, no dangerous escape of fluid orsteam could result. Furthermore, the valve can be taken apart forpurposes of repair or replacement, by removing the gland nut 30, theretaining nut 17 and the sleeve 24, while pressure is maintained in theboiler. The part 26 will hold the valve stem in its normal position,concentric with the valve body. Should scale or other incrustationaccumulate about the valve seat and the valve member, this can be easilybroken away through the opening of the valve, by turning the stem in theproper direction. Furthermore, the rush of steam or fluid through thevalve body, and the escape nozzle or the gage glass, when the valve isopen will tend to clear the body of undesirable accumulations.

Having thus described our invention, We claim as new, and desire tosecure by Letters Patent 1. A device of the class described, comprisinga valve member adapted to be mounted upon a boiler wall and having avalve seat and a threaded neck, a retaining nut mounted upon saidthreaded neck and having an annular groove, an internally threadedsleeve having a laterally extended flange received in said groove andclamped by said nut against said neck, and a valve stem extendingthrough said sleeve and having a valve member adapted to engage at saidseat.

2. A device of the class described, comprising a valve body having aneck for the attachment of said body to a boiler wall, said neck havingat the end a valve seat, said body having at the other end a threadedneck, a retaining nut removably mounted upon said last-mentioned neck,and having an annular groove, an internally threaded sleeve having aflange and extending through said retaining nut, whereby said flange isclamped between the end of said last-mentioned neck and said retainingnut, and is received in said groove, a gland nut at the end of saidsleeve, a threaded stem extending through said sleeve and having at theend a valve member adapted to cooperate with said valve seat, and meansfor manipulating said valve stem.

3. A device of the class described, comprising a valve body having areduced neck for the attachment of said body to a boiler wall, said neckbeing adapted to extend through the boiler wall and having at the otherend a threaded neck, a retaining nut removably mounted upon saidthreaded neck and having an annular groove, an internally threadedsleeve having a flange and extending through said retaining nut wherebysaid flange is clamped between the end of said threaded neck and saidretaining nut and is received in said groove, a gland nut at the end ofsaid sleeve, a threaded 120 end a valve seat, said body having at the'member adapted to cooperate with said stem extending through saidsleeve and said names to this specification in the presence of gland nutand having at one end a valve two subscribing-witnesses. valve seat anda hand wheel at the other GEORGE LEMUEL TILLOTSON end of said valvestem, said valve body MARKS HAROLD NICHOLAS having means whereby it canbeassociated Witnesses: with a gage glass. RALPH L. NIOH NE,

In testimony whereof we have signed our Ross SUAREK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. G.

